The continuous representation of the ground obtained by assembling aerial photographs, with scale and tilt corrected, and possibly including gridlines, boundaries, place names, and marginal information, is called what?

• A. Orthophoto Map
• B. Photo Map
• C. Aerial Photo
• D. Base Map

Answer: (A)

The idea here is a standard map product created from aerial photographs that has been corrected for camera tilt and terrain so that every point on the image matches its true ground position and distance. This process, called orthorectification, produces a continuous, planimetric view of the ground where the scale is uniform across the image. When multiple corrected photos are assembled and may include gridlines, boundaries, place names, and marginal information, you end up with an orthophoto map. It behaves like a true map because distances measured on it correspond to real ground distances, even over uneven terrain.

An aerial photo alone still shows distortions from perspective and relief, so it isn’t suitable as a measuring map. A photo map can imply a mosaic of photos but without the guaranteed true-scale correction. A base map is a broader reference map, not specifically the rectified photographic mosaic described.